How Does Robert Hill Find The Rate Of Photosynthesis
Introduction
Photosynthesis takes place in the chloroplast and is the use of sunlight energy for cell processes. It happens through a number of chemical reactions and the transfer of electrons. It is used as the source of energy (ATP) for plants. The reaction equation for photosynthesis is
H2O + CO2 + (Light) (CH2O)N + CO2
In the Hill reaction, Robert Hill showed how chloroplasts in water can still function if there is light and an electron acceptor to release oxygen. He proved that the oxygen in photosynthesis comes from water instead of carbon dioxide, which had previously been the consensus. He also demonstrated the difference between light-dependent (“photo”) photosynthesis and light-independent (“synthesis”) photosynthesis (Stegenga, …show more content…
The rate was still calculated for each experimental tube. It is important to calculate the rate because if one experimental value stays at a relatively high constant rate yet another changes from a low value to a high value then that won’t be shown unless the rate of each is taken. The rate is able to show the change in values rather than just the individual values of the data. It is calculated by the change in percent of transmittance over the change in time. There were some unexpected results in our data. For example, the boiled purple lettuce had a higher rate of transmittance than the unboiled purple lettuce. That would be expected to be the opposite since the boiled chloroplast would have denatured proteins. Figure 1 displays the increase or decrease in the percent of transmittance for each tube over the 15-minute test period. It shows the relationship between the unboiled and boiled purple lettuce, where the boiled purple lettuce had a higher percent of transmittance than the unboiled purple lettuce. Also, the unboiled romaine lettuce had a negative rate of transmittance which would mean that there were less photosynthetic processes happening over time. Figure 2 displays that the unboiled spinach had the highest rate of transmittance by about 0.9734, boiled purple lettuce had the second greatest rate of transmittance. It also shows how boiled spinach and boiled romaine lettuce had decreases in rate of transmittance yet boiled purple lettuce had an increase in the
Photosynthesis takes place in the chloroplast and is the use of sunlight energy for cell processes. It happens through a number of chemical reactions and the transfer of electrons. It is used as the source of energy (ATP) for plants. The reaction equation for photosynthesis is
H2O + CO2 + (Light) (CH2O)N + CO2
In the Hill reaction, Robert Hill showed how chloroplasts in water can still function if there is light and an electron acceptor to release oxygen. He proved that the oxygen in photosynthesis comes from water instead of carbon dioxide, which had previously been the consensus. He also demonstrated the difference between light-dependent (“photo”) photosynthesis and light-independent (“synthesis”) photosynthesis (Stegenga, …show more content…
The rate was still calculated for each experimental tube. It is important to calculate the rate because if one experimental value stays at a relatively high constant rate yet another changes from a low value to a high value then that won’t be shown unless the rate of each is taken. The rate is able to show the change in values rather than just the individual values of the data. It is calculated by the change in percent of transmittance over the change in time. There were some unexpected results in our data. For example, the boiled purple lettuce had a higher rate of transmittance than the unboiled purple lettuce. That would be expected to be the opposite since the boiled chloroplast would have denatured proteins. Figure 1 displays the increase or decrease in the percent of transmittance for each tube over the 15-minute test period. It shows the relationship between the unboiled and boiled purple lettuce, where the boiled purple lettuce had a higher percent of transmittance than the unboiled purple lettuce. Also, the unboiled romaine lettuce had a negative rate of transmittance which would mean that there were less photosynthetic processes happening over time. Figure 2 displays that the unboiled spinach had the highest rate of transmittance by about 0.9734, boiled purple lettuce had the second greatest rate of transmittance. It also shows how boiled spinach and boiled romaine lettuce had decreases in rate of transmittance yet boiled purple lettuce had an increase in the